Furnace bottom structure of direct current electric furnace

Details Furnace bottom structure of direct current electric furnace Furnace bottom structure of direct current electric furnace

1991-03-25

1993-01-05

Reynolds, Bruce A.

Industrial electric heating furnaces

Arc furnace device

Furnace body detail

373 22, 373 62, 373 71, 75 104, 75 1042, 75552, 266 35, 266158, 266222, F27D 100

Patent

active

051777630

ABSTRACT:
A furnace bottom structure of a direct current electric furnace has at least one furnace bottom electrode and at least one gas injection tuyere provided in the furnace bottom refractory of the direct current electric furnace. Preferably, the furnace bottom electrodes and the gas injection tuyere are embedded in a substantially cylindrical refractory body with downwardly diverging tapered upper portion. The refractory body, the furnace bottom electrodes and the gas injection tuyere form an integral furnace bottom block which is detachably attached to the bottom of the electric furnace so as to close a bottom opening of the furnace.

REFERENCES:
patent: 3708599 (1973-01-01), Krause
patent: 3902889 (1975-09-01), Malin
patent: 3918692 (1975-11-01), Oberg
patent: 4414673 (1983-11-01), Lugscheider et al.
patent: 4483709 (1984-11-01), Schempp et al.
patent: 4617671 (1986-10-01), Lugscheider et al.
patent: 4726033 (1988-02-01), Lazcano-Navarro et al.
patent: 4754464 (1988-06-01), Feuerstake
patent: 4796277 (1989-01-01), Maddever et al.
patent: 4982411 (1991-01-01), Michelet et al.

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